In the intricate landscape of industrial processes, the selection of valves to withstand the onslaught of strong acids, alkalis, and corrosive mediums emerges as a critical endeavor. From sulfuric acid's potent corrosion to the challenges posed by hydrochloric acid, nitric acid, acetic acid, alkalis, and ammonia, each medium demands meticulous consideration for optimal valve selection.
In this realm, material compatibility, corrosion resistance, and operational efficacy intertwine to guide the choice of valves that ensure not only functionality but also longevity and safety. Delve with us into the realm of valve selection for corrosive mediums, where the interplay of materials, technology, and environmental factors charts the course for reliable industrial operations.
Strong acid strong alkali and other corrosive medium valve selection
1, Sulfuric acid medium valve
As one of the strong corrosive media, sulfuric acid is an important industrial raw material with a wide range of uses. Different concentrations and temperatures of sulfuric acid on the corrosion of the material is very different, for the concentration of more than 80%, the temperature is less than 80℃ concentrated sulfuric acid, carbon steel valves and cast iron valves have better corrosion resistance, but it is not suitable for high-speed flow of sulfuric acid, not used as a pump valve material. If the pressure is high,when the temperature rises, the point of use of the plastic valve will be impacted, you could choose a ceramic ball valve.
2, Hydrochloric acid medium valve
You can try the emerging ceramic ball valve, the advantages of this Voto valve are self-lubricating, small torque force, and no aging. Life is much longer than the general valve, its disadvantage is that the price is much higher than the plastic valve.
3,Nitric acid medium valve
stainless steel valves are the most widely used nitric acid resistant materials, all concentrations of nitric acid at room temperature have good corrosion resistance.
4. Acetic acid medium valve
It is one of the most corrosive substances in organic acids, ordinary steel will be seriously corroded in acetic acid at all concentrations and temperatures, stainless steel is an excellent acetic acid resistant material, 316 stainless steel valves containing molybdenum can also be applied to high temperature and dilute acetic acid steam. For high temperature, high concentrated acetic acid or containing other corrosive media and other harsh requirements, high alloy stainless steel valves or fluorine plastic valves can be selected.
5. Alkali (sodium hydroxide) medium valve
stainless steel valves are not recommended. For high temperature lye, titanium and titanium alloy valves or high alloy stainless steel valves are used.
6. Ammonia (ammonia hydroxide) medium valve
Most metals and non-metals in liquid ammonia and ammonia water (ammonia hydroxide) corrosion is very slight, only copper and copper alloys should not be used.
There are many other media can not be introduced here one by one, we will introduce more in future .
